1) Turn the computer on. After Windows has fully loaded, install the Installation Disk that comes with the Nvidia GeForce FX5500 graphics card, into the optical drive. (CD/DVD drive)
The disk has the Drivers, and Nvidia Control Panel.http://us.download.nvidia.com/Windows/175.19/175.19_NVIDIA_Control_Panel_Quick_Start_Guide.pdf
Driver: Small piece of software that allows the Operating System to communicate with a device.
Windows XP is the O/S.
The Nvidia GeForce FX5500 is the device.
Don't have the disk?http://www.nvidia.com/object/winxp_175.19_whql.html
Download AND install.
[After you click on Download, a small window will come up on the right -
Click on Save File.
Another small window will open on the left. Allow the file to fully download, then DOUBLE-click right on the file name.
At the bottom of the next three small windows, click on Next, Next, and Finish.
Now restart the computer.
Windows will NOT use these drivers until the graphics card is installed, so don't worry about messing the graphics up.
Because when a device is installed, Windows 'breaks it's neck' to find suitable, matching drivers.
If THE drivers are not there, Windows will match up one of it's THOUSANDS of generic, one size fits all drivers.
This = No.
This is why you want THE drivers installed first, THEN physically install the graphics card ]
2) Unplug the computer from power. Press the Power On button in, and hold it in for a count of 10 seconds. Let go. Do this procedure two more times. (Drains the residual power)
3) FOLLOW Anti-Static Precautions.
Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components of a computer.
Relieve your body of Static BEFORE working on the computer.
Computer ON a table, computer unplugged from power, computer case open;
TOUCH an unpainted surface, of the metal frame of the open computer case.
This action will relieve your body of Static.
IF you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.
Don't follow Anti-Static Precautions, may as well get ready to use your motherboard for a Frisbee, or a doorstop.
4) There is a Locking Arm on the PCI-Express x16 slot. It looks as though you press down to unlock.
Gently pull up a little, as you push the graphics card Straight down into the PCI-Express x16 slot.
5) Be SURE to connect the monitor cable to the graphics card, and not back into the I/O area. (Motherboard)
For additional questions please post in a Comment.